With all the money being funneled back through New York. I think even BroJoeK admits New York controlled the Southern export market.
You have a qualifier for almost every claim you make, don't you?
I do freely admit that from 1801 through 1861 Northern Democrats in New York allied with Southern Democrats ruling Washington DC both controlled and benefitted by those "money flows from Europe".
What I don't accept is that the 1861 "divorce" of Northern & Southern Democrats somehow caused Republicans to "launch war" against "the South".
Any Lost Causer evidence for it is both disputed historiographical-ly and denied by public statements from all parties at the time.
Slavery was the reason for secession.
Rebellion at Fort Sumter was the reason for Civil War.
Slavery was of growing importance during the war, almost from Day One.
Facts.